11. verify驗證方法呼叫
阿新 • • 發佈:2020-11-23
java.util.Arrays 類能方便地運算元組,它提供的所有方法都是靜態的。
例子如下:
import java.util.Arrays;
public class Test3 {
public static void main(String[] args) {
int [] nums = {6,9,8,4,2};
Arrays.sort(nums);
System.out.println("------升序-----");
for (int num : nums) {
System. out.print(num+"");
}
System.out.println("\n------降序-----");
for (int i = nums.length-1; i >=0 ; i--) {
System.out.print(nums[i]+"");
}
System.out.println("\n------字串排序-----");
String [] mm = {"n","1","6","M","a","5"};
Arrays.sort (mm);
for (String s : mm) {
System.out.print(s);
}
System.out.println("\n------判斷兩個陣列是否相等-----");
int [ ] num1 = {1,2,3};
int [ ] num2 = {1,2,4};
boolean b = Arrays.equals(num1, num2);
System.out.print(b);
System.out.println ("\n------轉換為字串-----");
int [] num3 = {5,6,4,5,8};
String s = Arrays.toString(num3);
System.out.print(s);
System.out.println("\n------賦值相同數值-----");
int [ ] num4 = {1,2,4};
Arrays.fill(num4,66);
for (int i : num4) {
System.out.print(i+" ");
}
System.out.println("\n------複製為新陣列-----");
int [ ] num5 = {1,2,4};
int[] num55 = Arrays.copyOf(num5, 5);
for (int i : num55) {
System.out.print(i);
}
System.out.println("\n------查詢元素下標-----");
int [ ] num6 = {1,2,4};
int i = Arrays.binarySearch(num6, 4);
System.out.println(i);
}
}
執行結果如下: